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Modeling the Blast Load Simulator Airblast Environment using First Principles Codes. Report 1, Blast Load Simulator Environment
Army Engineer Research and Development Center Vicksburg
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The Blast Load Simulator BLS at the U.S. Army Engineer Research and Development Center ERDC has been utilized for applying simulated blast loads on structures for more than a decade however, the experimental efforts to date have not included a computational modeling component. The Defense Threat Reduction Agency tasked ERDC to conduct an integrated experimentalcomputational program to evaluate several first principles codes FPCs for modeling airblast environments typical of those encountered in the BLS. The FPCs considered were CTH, DYSMAS, LociBLAST, RAGE, and SHAMRC. These codes afforded a range of numerical solvers and equation of state options for the modeling effort. The FPCs were evaluated against data generated in the BLS. Three experimental configurations were considered for the validation. These included two empty configurations, with comparisons drawn against reflected pressures measured at the downstream end wall. The third included a box-like structure in the flow field. The structure was instrumented on the exposed surfaces to provide a more challenging scenario for the model comparisons. The purpose of the integrated program was to assess computational accuracy and cost of the aforementioned FPCs and identify any shortcomings in the physics modeling and areas for future improvement. Findings from the integrated program are discussed in this report.
APPROVED FOR PUBLIC RELEASE